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You use Qt library. It is

You use Qt library. It is very easy to use QProcess wrapper to run exiftool (make sure you've closed raw file handle in Windows to allow access, LibRaw::recycle_datastream() do that, keeping all parsed data in memory).

We supply exiftool binary with our RawDigger software, exiftool's license permits this.

-- Alex Tutubalin @LibRaw LLC